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The properties of $Co^{2+}$
in zeolites CoX and CoY and their interaction with CO, NO, and propene were fol-
lowed. The IR experiments of CO and NO informed on the electron acceptor properties of $Co^{2+}$
sites and
the influence of framework composition and of geometry of $Co^{2+}$
environment on the properties of $Co^{2+}$
.It
has been found, that the activation of CO and NO is realized mostly by $\pi$
back donation, on the other hand,
the activation of C=C double bond in propene is realized by $\pi$
donation. The strength of molecules to $Co^{2+}$
bonding was followed in desorption experiments. It has been found, that $\sigma$
donation in the case of CO anD $\pi$
donation has more important impact to the strength of molecule to $Co^{2+}$
bonding.
keywords in English:
Co-zeolites, NO adsorption, CO adsorption, IR spectroscopy
departmental parameterization:
20
affiliation:
Wydział Chemii : Zakład Chemii Analitycznej, Wydział Chemii : Zakład Chemii Nieorganicznej